68628999 has 4 divisors (see below), whose sum is σ = 91505336. Its totient is φ = 45752664.

The previous prime is 68628997. The next prime is 68629021. The reversal of 68628999 is 99982686.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68628999 - 2¹ = 68628997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68628991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11438164 + ... + 11438169.

It is an arithmetic number, because the mean of its divisors is an integer number (22876334).

Almost surely, 2^68628999 is an apocalyptic number.

68628999 is a deficient number, since it is larger than the sum of its proper divisors (22876337).

68628999 is a wasteful number, since it uses less digits than its factorization.

68628999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22876336.

The product of its digits is 3359232, while the sum is 57.

The square root of 68628999 is about 8284.2621276732. The cubic root of 68628999 is about 409.4201579383.

The spelling of 68628999 in words is "sixty-eight million, six hundred twenty-eight thousand, nine hundred ninety-nine".